any other payment by Lessee to such Indemnitee theretofore made pursuant to Section 10(a). If any Indemnitee shall have paid the Lessee any refund of all or part of any Tax paid by Lessee and it is subsequently determined that such Indemnitee was not entitled to the refund, such determination shall be treated as the imposition of a Tax for which Lessee is obligated to indemnify such Indemnitee pursuant to the provisions of Section 10(a). An Indemnitee shall not settle any such claim or contest pursuant to this provision without the written consent of Lessee (which consent shall not be unreasonably withheld).